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Jeon BJ, Kwon DH, Gim GM, Kim HK, Lee JH, Jang G. Stable long-term germline transmission of GFP transgenic rat via PiggyBac transposon mediated gene transfer. BMC Vet Res 2024; 20:275. [PMID: 38918814 PMCID: PMC11201299 DOI: 10.1186/s12917-024-04123-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 06/10/2024] [Indexed: 06/27/2024] Open
Abstract
Transgene silencing provides a significant challenge in animal model production via gene engineering using viral vectors or transposons. Selecting an appropriate strategy, contingent upon the species is crucial to circumvent transgene silencing, necessitating long-term observation of in vivo gene expression. This study employed the PiggyBac transposon to create a GFP rat model to address transgene silencing in rats. Surprisingly, transgene silencing occurred while using the CAG promoter, contrary to conventional understanding, whereas the Ef1α promoter prevented silencing. GFP expression remained stable through over five generations, confirming efficacy of the Ef1α promoter for long-term protein expression in rats. Additionally, GFP expression was consistently maintained at the cellular level in various cellular sources produced from the GFP rats, thereby validating the in vitro GFP expression of GFP rats. Whole-genome sequencing identified a stable integration site in Akap1 between exons 1 and 2, mitigating sequence-independent mechanism-mediated transgene silencing. This study established an efficient method for producing transgenic rat models using PiggyBac transposon. Our GFP rats represent the first model to exhibit prolonged expression of foreign genes over five generations, with implications for future research in gene-engineered rat models.
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Affiliation(s)
- Beom-Jin Jeon
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
- Comparative Medicine Disease Research Center, Seoul National University, Seoul, Republic of Korea
| | - Dong-Hyeok Kwon
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
- Comparative Medicine Disease Research Center, Seoul National University, Seoul, Republic of Korea
| | | | - Hee-Kyoung Kim
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
| | - Jeong-Hwa Lee
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea
- K-BIO KIURI Center, Seoul National University, Seoul, Republic of Korea
| | - Goo Jang
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 1 Gwanak-Ro, Gwanak-Gu, Seoul, 08826, Republic of Korea.
- LARTBio Incorp, Gyeonggi-Do, Republic of Korea.
- Comparative Medicine Disease Research Center, Seoul National University, Seoul, Republic of Korea.
- Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya, Indonesia.
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Gim GM, Jang G. Outlook on genome editing application to cattle. J Vet Sci 2024; 25:e10. [PMID: 38311323 PMCID: PMC10839183 DOI: 10.4142/jvs.23133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 08/04/2023] [Accepted: 08/20/2023] [Indexed: 02/07/2024] Open
Abstract
In livestock industry, there is growing interest in methods to increase the production efficiency of livestock to address food shortages, given the increasing global population. With the advancements in gene engineering technology, it is a valuable tool and has been intensively utilized in research specifically focused on human disease. In historically, this technology has been used with livestock to create human disease models or to produce recombinant proteins from their byproducts. However, in recent years, utilizing gene editing technology, cattle with identified genes related to productivity can be edited, thereby enhancing productivity in response to climate change or specific disease instead of producing recombinant proteins. Furthermore, with the advancement in the efficiency of gene editing, it has become possible to edit multiple genes simultaneously. This cattle breed improvement has been achieved by discovering the genes through the comprehensive analysis of the entire genome of cattle. The cattle industry has been able to address gene bottlenecks that were previously impossible through conventional breeding systems. This review concludes that gene editing is necessary to expand the cattle industry, improving productivity in the future. Additionally, the enhancement of cattle through gene editing is expected to contribute to addressing environmental challenges associated with the cattle industry. Further research and development in gene editing, coupled with genomic analysis technologies, will significantly contribute to solving issues that conventional breeding systems have not been able to address.
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Affiliation(s)
| | - Goo Jang
- LARTBio Inco, Seoul 06221, Korea
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul 08826, Korea
- Comparative medicine Disease Research Center, Seoul National University, Seoul 08826, Korea
- Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya 60115, Indonesia.
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3
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Gim GM, Eom KH, Kwon DH, Jung DJ, Kim DH, Yi JK, Ha JJ, Lee JH, Lee SB, Son WJ, Yum SY, Lee WW, Jang G. Generation of double knockout cattle via CRISPR-Cas9 ribonucleoprotein (RNP) electroporation. J Anim Sci Biotechnol 2023; 14:103. [PMID: 37543609 PMCID: PMC10404370 DOI: 10.1186/s40104-023-00902-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Accepted: 06/04/2023] [Indexed: 08/07/2023] Open
Abstract
BACKGROUND Genome editing has been considered as powerful tool in agricultural fields. However, genome editing progress in cattle has not been fast as in other mammal species, for some disadvantages including long gestational periods, single pregnancy, and high raising cost. Furthermore, technically demanding methods such as microinjection and somatic cell nuclear transfer (SCNT) are needed for gene editing in cattle. In this point of view, electroporation in embryos has been risen as an alternative. RESULTS First, editing efficiency of our electroporation methods were tested for embryos. Presence of mutation on embryo was confirmed by T7E1 assay. With first combination, mutation rates for MSTN and PRNP were 57.6% ± 13.7% and 54.6% ± 13.5%, respectively. In case of MSTN/BLG, mutation rates were 83.9% ± 23.6% for MSTN, 84.5% ± 18.0% for BLG. Afterwards, the double-KO embryos were transferred to surrogates and mutation rate was identified in resultant calves by targeted deep sequencing. Thirteen recipients were transferred for MSTN/PRNP, 4 calves were delivered, and one calf underwent an induction for double KO. Ten surrogates were given double-KO embryos for MSTN/BLG, and four of the six calves that were born had mutations in both genes. CONCLUSIONS These data demonstrated that production of genome edited cattle via electroporation of RNP could be effectively applied. Finally, MSTN and PRNP from beef cattle and MSTN and BLG from dairy cattle have been born and they will be valuable resources for future precision breeding.
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Affiliation(s)
- Gyeong-Min Gim
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea
- LARTBio Co., Ltd., Seoul, Republic of Korea
| | - Kyeong-Hyeon Eom
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea
- LARTBio Co., Ltd., Seoul, Republic of Korea
| | - Dong-Hyeok Kwon
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea
| | - Dae-Jin Jung
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | - Dae-Hyun Kim
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | - Jun-Koo Yi
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | - Jae-Jung Ha
- Gyeongsangbukdo Livestock Research Institute, Yeongju, Republic of Korea
| | | | | | | | | | - Won-Wu Lee
- LARTBio Co., Ltd., Seoul, Republic of Korea
| | - Goo Jang
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea.
- LARTBio Co., Ltd., Seoul, Republic of Korea.
- Comparative Medicine Disease Research Center, Seoul National University, Seoul, Republic of Korea.
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Kim MJ, Gim GM, Jang G. Supplement of secreted recombinant low molecular weight human fibroblast growth factor 2 in culture media enhances in vitro bovine maturation. Res Vet Sci 2022; 153:27-34. [PMID: 36306542 DOI: 10.1016/j.rvsc.2022.10.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 09/25/2022] [Accepted: 10/06/2022] [Indexed: 11/06/2022]
Abstract
With the annual increase in in vitro bovine embryo production, understanding oocyte maturation is becoming more important. Previous studies have shown that oocyte maturation can be improved by adding bovine additives to in vitro maturation media. Among the additives, human fibroblast growth factor 2 (hFGF2) is well known for its positive influence on the growth rate and quality of cells and oocytes. However, the effect of LMW-hFGF2, one of the isoforms of hFGF2, on bovine in vitro maturation has not yet been identified. Therefore, the goal of this study was to elucidate the effect of LMW-hFGF2 on bovine oocyte maturation. Vectors expressing LMW-hFGF2 were cloned and transfected into cells. Afterward, secretion of LMW-hFGF2 from cells was confirmed, and used to assess the effect LMW-hFGF2 on cells and bovine oocytes. LMW-hFGF2 improved bovine oocyte maturation and embryo developmental competence. Laboratories can use LMW-hFGF2 in bovine oocyte culture media to improve in vitro embryo production success rates.
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Affiliation(s)
- Min-Ji Kim
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 08826, Republic of Korea; BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul 088826, Republic of Korea
| | - Gyeong-Min Gim
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 08826, Republic of Korea; BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul 088826, Republic of Korea
| | - Goo Jang
- Laboratory of Theriogenology and Biotechnology, Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, 08826, Republic of Korea; BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul 088826, Republic of Korea; LARTBio Incorp, Seoul 06221, Republic of Korea; Comparative Medicine Disease Research Center, Seoul National University, Seoul 08826, Republic of Korea; Faculty of Veterinary Medicine, Universitas Airlangga, Surabaya 60115, Indonesia.
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5
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Xie Y, Wang M, Gu L, Wang Y. CRISPR/Cas9-mediated knock-in strategy at the Rosa26 locus in cattle fetal fibroblasts. PLoS One 2022; 17:e0276811. [PMID: 36441701 PMCID: PMC9704577 DOI: 10.1371/journal.pone.0276811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2022] [Accepted: 10/14/2022] [Indexed: 11/29/2022] Open
Abstract
The genetic modification of cattle has many agricultural and biomedical applications. However, random integration often leads to the unstable or differentially expression of the exogenous genes, which limit the application and development of transgenic technologies. Finding a safe locus suitable for site-specific insertion and efficient expression of exogenous genes is a good way to overcome these hurdles. In this study, we efficiently integrated three targeted vector into the cattle Rosa26 (cRosa26) by CRISPR/Cas9 technology in which EGFP was driven by CAG, EF1a, PGK and cRosa26 endogenous promoter respectively. The CRISPR/Cas9 knock-in system allows highly efficient gene insertion of different expression units at the cRosa26 locus. We also find that in the four cell lines, EGFP was stable expressed at different times, and the CAG promoter has the highest activity to activate the expression of EGFP, when compared with the cRosa26, EF1a and PGK promoter. Our results proved that cRosa26 was a locus that could integrate different expression units efficiently, and supported the friendly expression of different expression units. Our findings described here will be useful for a variety of studies using cattle.
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Affiliation(s)
- Yuxuan Xie
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin jianzhu University, Changchun, Jilin Province, People’s Republic of China
| | - Ming Wang
- College of Animal Science and Technology, China Agricultural University, Beijing, People’s Republic of China
| | - Liang Gu
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin jianzhu University, Changchun, Jilin Province, People’s Republic of China
| | - Yang Wang
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin jianzhu University, Changchun, Jilin Province, People’s Republic of China
- * E-mail:
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He Y, Huang Y, Wang S, Zhang L, Gao H, Zhao Y, E G. Hereditary Basis of Coat Color and Excellent Feed Conversion Rate of Red Angus Cattle by Next-Generation Sequencing Data. Animals (Basel) 2022; 12:1509. [PMID: 35739846 PMCID: PMC9219544 DOI: 10.3390/ani12121509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/24/2022] [Accepted: 06/07/2022] [Indexed: 12/03/2022] Open
Abstract
Angus cattle have made remarkable contributions to the livestock industry worldwide as a commercial meat-type breed. Some evidence supported that Angus cattle with different coat colors have different feed-to-meat ratios, and the genetic basis of their coat color is inconclusive. Here, genome-wide association study was performed to investigate the genetic divergence of black and red Angus cattle with 63 public genome sequencing data. General linear model analysis was used to identify genomic regions with potential candidate variant/genes that contribute to coat color and feed conversion rate. Results showed that six single nucleotide polymorphisms (SNPs) and two insertion−deletions, which were annotated in five genes (ZCCHC14, ANKRD11, FANCA, MC1R, and LOC532875 [AFG3-like protein 1]), considerably diverged between black and red Angus cattle. The strongest associated loci, namely, missense mutation CHIR18_14705671 (c.296T > C) and frameshift mutation CHIR18_12999497 (c.310G>-), were located in MC1R. Three consecutive strongly associated SNPs were also identified and located in FANCA, which is widely involved in the Fanconi anemia pathway. Several SNPs of highly associated SNPs was notably enriched in ZCCHC14 and ANKRD11, which are related to myofiber growth and muscle development. This study provides a basis for the use of potential genetic markers to be used in future breeding programs to improve cattle selection in terms of coat color and meat phenotype. This study is also helpful to understand the hereditary basis of different coat colors and meat phenotypes. However, the putative candidate genes or markers identified in this study require further investigation to confirm their phenotypic causality and potential effective genetic relationships.
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Affiliation(s)
- Yongmeng He
- College of Animal Science and Technology, Southwest University, Chongqing 400716, China; (Y.H.); (Y.H.); (S.W.); (Y.Z.)
| | - Yongfu Huang
- College of Animal Science and Technology, Southwest University, Chongqing 400716, China; (Y.H.); (Y.H.); (S.W.); (Y.Z.)
| | - Shizhi Wang
- College of Animal Science and Technology, Southwest University, Chongqing 400716, China; (Y.H.); (Y.H.); (S.W.); (Y.Z.)
| | - Lupei Zhang
- Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; (L.Z.); (H.G.)
| | - Huijiang Gao
- Institute of Animal Science, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; (L.Z.); (H.G.)
| | - Yongju Zhao
- College of Animal Science and Technology, Southwest University, Chongqing 400716, China; (Y.H.); (Y.H.); (S.W.); (Y.Z.)
| | - Guangxin E
- College of Animal Science and Technology, Southwest University, Chongqing 400716, China; (Y.H.); (Y.H.); (S.W.); (Y.Z.)
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7
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Kwon DH, Gim GM, Eom KH, Lee JH, Jang G. Application of transposon systems in the transgenesis of bovine somatic and germ cells. BMC Vet Res 2022; 18:156. [PMID: 35477562 PMCID: PMC9044889 DOI: 10.1186/s12917-022-03252-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Accepted: 04/14/2022] [Indexed: 12/12/2022] Open
Abstract
Background Several DNA transposons including PiggyBac (PB), Sleeping Beauty (SB), and Tol2 have been applied as effective means for of transgenesis in many species. Cattle are not typically experimental animals, and relatively little verification has been presented on this species. Thus, the goal here was to determine the applicability of three transposon systems in somatic and embryo cells in cattle, while also investigating which of the three systems is appropriate for each cell type. Green fluorescent protein (GFP)-expressing transposon systems were used for electroporation and microinjection in the somatic cells and embryo stage, respectively. After transfection, the GFP-positive cells or blastocysts were observed through fluorescence, while the transfection efficiency was calculated by FACS. Results In bovine somatic cells, the PB (63.97 ± 11.56) showed the highest efficiency of the three systems (SB: 50.74 ± 13.02 and Tol2: 16.55 ± 5.96). Conversely, Tol2 (75.00%) and SB (70.00%) presented a higher tendency in the embryonic cells compared to PB (42.86%). Conclusions These results demonstrate that these three transposon systems can be used in bovine somatic cells and embryos as gene engineering experimental methods. Moreover, they demonstrate which type of transposon system to apply depending on the cell type. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03252-1.
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Affiliation(s)
- Dong-Hyeok Kwon
- Laboratory of Theriogenology, College of Veterinary Medicine, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea, 08826.,BK21 PLUS program, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Gyeong-Min Gim
- Laboratory of Theriogenology, College of Veterinary Medicine, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea, 08826.,BK21 PLUS program, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | - Kyeong-Hyeon Eom
- Laboratory of Theriogenology, College of Veterinary Medicine, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea, 08826.,BK21 PLUS program, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea
| | | | - Goo Jang
- Laboratory of Theriogenology, College of Veterinary Medicine, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, Republic of Korea, 08826. .,BK21 PLUS program, College of Veterinary Medicine, Seoul National University, Seoul, 08826, Republic of Korea. .,LARTBio Inc, Seoul, Republic of Korea.
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8
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Monzani PS, Adona PR, Long SA, Wheeler MB. Cows as Bioreactors for the Production of Nutritionally and Biomedically Significant Proteins. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021; 1354:299-314. [PMID: 34807448 DOI: 10.1007/978-3-030-85686-1_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Dairy and beef cattle make a vital contribution to global nutrition, and since their domestication, they have been continuously exposed to natural and artificial selection to improve production characteristics. The technologies of transgenesis and gene editing used in cattle are responsible for generating news characteristics in bovine breeding, such as alteration of nutritional components of milk and meat enhancing human health benefits, disease resistance decreasing production costs and offering safe products for human food, as well as the recombinant protein production of biomedical significance. Different methodologies have been used to generate transgenic cattle as bioreactors. These methods include the microinjection of vectors in pronuclear, oocyte or zygote, sperm-mediate transgenesis, and somatic cell nuclear transfer. Gene editing has been applied to eliminate unwanted genes related to human and animal health, such as allergy, infection, or disease, and to insert transgenes into specific sites in the host genome. Methodologies for the generation of genetically modified cattle are laborious and not very efficient. However, in the last 30 years, transgenic animals were produced using many biotechnological tools. The result of these modifications includes (1) the change of nutritional components, including proteins, amino acids and lipids for human nutrition; (2) the removal allergic proteins milk; (3) the production of cows resistant to disease; or (4) the production of essential proteins used in biomedicine (biomedical proteins) in milk and blood plasma. The genetic modification of cattle is a powerful tool for biotechnology. It allows for the generation of new or modified products and functionality that are not currently available in this species.
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Affiliation(s)
- P S Monzani
- Instituto Chico Mendes de Conservação da Biodiversidade/Centro Nacional de Pesquisa e Conservação da Biodiversidade Aquática Continental, Pirassununga, SP, Brasil.
| | - P R Adona
- Saúde e Produção de Ruminantes, Universidade Norte do Paraná, Arapongas, PR, Brasil
| | - S A Long
- Departments of Animal Sciences and Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - M B Wheeler
- Departments of Animal Sciences and Bioengineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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Sandoval-Villegas N, Nurieva W, Amberger M, Ivics Z. Contemporary Transposon Tools: A Review and Guide through Mechanisms and Applications of Sleeping Beauty, piggyBac and Tol2 for Genome Engineering. Int J Mol Sci 2021; 22:ijms22105084. [PMID: 34064900 PMCID: PMC8151067 DOI: 10.3390/ijms22105084] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Revised: 04/30/2021] [Accepted: 05/05/2021] [Indexed: 01/19/2023] Open
Abstract
Transposons are mobile genetic elements evolved to execute highly efficient integration of their genes into the genomes of their host cells. These natural DNA transfer vehicles have been harnessed as experimental tools for stably introducing a wide variety of foreign DNA sequences, including selectable marker genes, reporters, shRNA expression cassettes, mutagenic gene trap cassettes, and therapeutic gene constructs into the genomes of target cells in a regulated and highly efficient manner. Given that transposon components are typically supplied as naked nucleic acids (DNA and RNA) or recombinant protein, their use is simple, safe, and economically competitive. Thus, transposons enable several avenues for genome manipulations in vertebrates, including transgenesis for the generation of transgenic cells in tissue culture comprising the generation of pluripotent stem cells, the production of germline-transgenic animals for basic and applied research, forward genetic screens for functional gene annotation in model species and therapy of genetic disorders in humans. This review describes the molecular mechanisms involved in transposition reactions of the three most widely used transposon systems currently available (Sleeping Beauty, piggyBac, and Tol2), and discusses the various parameters and considerations pertinent to their experimental use, highlighting the state-of-the-art in transposon technology in diverse genetic applications.
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Affiliation(s)
| | | | | | - Zoltán Ivics
- Correspondence: ; Tel.: +49-6103-77-6000; Fax: +49-6103-77-1280
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Gim GM, Kwon DH, Lee WW, Jung DJ, Kim DH, Yi JK, Jang G. Transgenic F2 bovine embryos show stable germline transmission and maintenance of transgene expression through two generations. Biol Reprod 2020; 103:1148-1151. [PMID: 32915208 DOI: 10.1093/biolre/ioaa165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/03/2020] [Accepted: 09/09/2020] [Indexed: 12/13/2022] Open
Affiliation(s)
- Gyeong-Min Gim
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea.,BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - Dong-Hyeok Kwon
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea.,BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | | | - Dae-Jin Jung
- Gyeongsangbukdo Livestock Research Institute, Yeongju, GyeongSang Buk-Do, Republic of Korea
| | - Dae-Hyun Kim
- Gyeongsangbukdo Livestock Research Institute, Yeongju, GyeongSang Buk-Do, Republic of Korea.,Department of Biotechnology, College of Agriculture & Life Science, Hankyong National University, Anseong, Gyeonggi, Republic of Korea
| | - Jun-Koo Yi
- Gyeongsangbukdo Livestock Research Institute, Yeongju, GyeongSang Buk-Do, Republic of Korea
| | - Goo Jang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, Republic of Korea.,BK21 Plus program, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea.,LARTBio Inc., Seoul, Republic of Korea
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11
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In Vivo Piggybac-Based Gene Delivery towards Murine Pancreatic Parenchyma Confers Sustained Expression of Gene of Interest. Int J Mol Sci 2019; 20:ijms20133116. [PMID: 31247905 PMCID: PMC6651600 DOI: 10.3390/ijms20133116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/24/2019] [Accepted: 06/25/2019] [Indexed: 01/08/2023] Open
Abstract
The pancreas is a glandular organ that functions in the digestive system and endocrine system of vertebrates. The most common disorders involving the pancreas are diabetes, pancreatitis, and pancreatic cancer. In vivo gene delivery targeting the pancreas is important for preventing or curing such diseases and for exploring the biological function of genes involved in the pathogenesis of these diseases. Our previous experiments demonstrated that adult murine pancreatic cells can be efficiently transfected by exogenous plasmid DNA following intraparenchymal injection and subsequent in vivo electroporation using tweezer-type electrodes. Unfortunately, the induced gene expression was transient. Transposon-based gene delivery, such as that facilitated by piggyBac (PB), is known to confer stable integration of a gene of interest (GOI) into host chromosomes, resulting in sustained expression of the GOI. In this study, we investigated the use of the PB transposon system to achieve stable gene expression when transferred into murine pancreatic cells using the above-mentioned technique. Expression of the GOI (coding for fluorescent protein) continued for at least 1.5 months post-gene delivery. Splinkerette-PCR-based analysis revealed the presence of the consensus sequence TTAA at the junctional portion between host chromosomes and the transgenes; however, this was not observed in all samples. This plasmid-based PB transposon system enables constitutive expression of the GOI in pancreas for potential therapeutic and biological applications.
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12
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Saadeldin IM, Jang G. Sex differences in single IVF-derived bovine embryo cultured in chemically defined medium. Int J Vet Sci Med 2019; 6:S78-S80. [PMID: 30761326 PMCID: PMC6161862 DOI: 10.1016/j.ijvsm.2018.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 01/07/2018] [Accepted: 01/07/2018] [Indexed: 11/24/2022] Open
Abstract
Single embryo culture is essential for culturing embryos derived from few oocytes obtained from elite cows through ultrasonography guidance. Bovine in vitro fertilization (IVF) and individual embryo culture is a challenge as it generally leads to impaired embryo development. In this study, we explored the embryonic development and the sex ratio of IVF-derived bovine embryo cultured individually in chemically defined two-step culture medium. Total 63 cumulus-oocyte complexes were collected, in vitro matured, in vitro fertilized and the resultant fertilized oocytes were randomly cultured individually (4 trials, 15–16 oocytes each) in microdrops of 5 µL of a chemically defined two-step culture medium. Blastocysts were counted in every trial (n = 32, 50.79%) and all of them were used for both genomic DNA and total RNA extraction, cDNA synthesis and PCR using specific primers for GAPDH, GDP6, XIST and SRY genes. Results showed significant difference in expression of XIST (positive expression in 11 blastocysts) and SRY (positive expression in 21 blastocysts) mRNAs, P < .05. This result supports the hypothesis of sexual dimorphism among the pre-implantation in vitro produced embryos and provides an efficient medium for single bovine embryos in vitro production.
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Affiliation(s)
- Islam M Saadeldin
- Department of Animal Production, College of Food and Agricultural Sciences, King Saud University, 11451 Riyadh, Saudi Arabia.,Department of Physiology, Faculty of Veterinary Medicine, Zagazig University, 44519 Zagazig, Egypt
| | - Goo Jang
- Department of Theriogenology and Biotechnology, College of Veterinary Medicine, Seoul National University, Seoul, 08826, South Korea.,Emergence Center for Food-Medicine Personalized Therapy System, Advanced Institute of Convergence Technology, Seoul National University, Gyeonggi-Do, 16629, South Korea
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13
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Sun Z, Wang M, Han S, Ma S, Zou Z, Ding F, Li X, Li L, Tang B, Wang H, Li N, Che H, Dai Y. Production of hypoallergenic milk from DNA-free beta-lactoglobulin (BLG) gene knockout cow using zinc-finger nucleases mRNA. Sci Rep 2018; 8:15430. [PMID: 30337546 PMCID: PMC6194018 DOI: 10.1038/s41598-018-32024-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 07/18/2018] [Indexed: 12/26/2022] Open
Abstract
The whey protein β-lactoglobulin (BLG) is a major milk allergen which is absent in human milk. Here, we for the first time generated DNA-free BLG bi-allelic knockout cow by zinc-finger nuclease (ZFNs) mRNA and produced BLG-free milk. According to the allergenicity evaluation of BLG-free milk, we found it can trigger lower allergic reaction of Balb/c mice including the rectal temperature drop and the allergen-specific immunoglobulin IgE production; BLG free-milk was easily digested by pepsin at 2 min, while BLG in control milk was still not completely digested after 60 min, and the binding of IgE from cow's milk allergy (CMA) patients to BLG free-milk was significantly lower than that to the control milk. Meanwhile, the genome sequencing revealed that our animal is free of off-target events. Importantly, editing animal genomes without introducing foreign DNA into cells may alleviate regulatory concerns related to foods produced by genome edited animals. Finally, the ZFNs-mediated targeting in cow could be transmitted through the germline by breeding. These findings will open up unlimited possibilities of modifying milk composition to make it more suitable for human health and also improve the functional properties of milk.
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Affiliation(s)
- Zhaolin Sun
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Ming Wang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Shiwen Han
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China
| | - Shuangyu Ma
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Zhiyuan Zou
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Fangrong Ding
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Xinrui Li
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China
| | - Ling Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Bo Tang
- Beijing Genprotein Biotechnology Company, Beijing, China
| | - Haiping Wang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Ning Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Huilian Che
- Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing, China.
| | - Yunping Dai
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China.
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14
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Efficient targeted integration into the bovine Rosa26 locus using TALENs. Sci Rep 2018; 8:10385. [PMID: 29991797 PMCID: PMC6039519 DOI: 10.1038/s41598-018-28502-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 06/04/2018] [Indexed: 02/03/2023] Open
Abstract
The genetic modification of cattle has many agricultural and biomedical applications. However, random integration often results in the unstable expression of transgenes and unpredictable phenotypes. Targeting genes to the "safe locus" and stably expressing foreign genes at a high level are desirable methods for overcoming these hurdles. The Rosa26 locus has been widely used to produce genetically modified animals in some species expressing transgenes at high and consistent levels. For the first time, we identified a bovine orthologue of the mouse Rosa26 locus through a genomic sequence homology analysis. According to 5' rapid-amplification of cDNA ends (5'RACE), 3' rapid-amplification of cDNA ends (3'RACE), reverse transcription PCR (RT-PCR) and quantitative PCR (Q-PCR) experiments, this locus encodes a long noncoding RNA (lncRNA) comprising two exons that is expressed ubiquitously and stably in different tissues. The bovine Rosa26 (bRosa26) locus appears to be highly amenable to transcription activator-like effector nucleases (TALENs)-mediated knock-in, and ubiquitous expression of enhanced green fluorescent protein (EGFP) inserted in the bRosa26 locus was observed in various stages, including cells, embryos, fetus and cattle. Finally, we created a valuable master bRosa26-EGFP fetal fibroblast cell line in which any gene of interest can be efficiently introduced and stably expressed using recombinase-mediated cassette exchange (RMCE). The new tools described here will be useful for a variety of studies using cattle.
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15
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Identification of transposable elements fused in the exonic region of the olive flounder genome. Genes Genomics 2018; 40:707-713. [PMID: 29934806 DOI: 10.1007/s13258-018-0676-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Accepted: 02/26/2018] [Indexed: 10/17/2022]
Abstract
Transposable elements (TEs) are mobile genetic sequences that comprise a large portion of vertebrate genomes. The olive flounder (Paralichthys olivaceus) is a valuable marine resource in East Asia. The scope of most genomic studies on the olive flounder is limited to its immunology as their focus is the prevention of mass mortality of this species. Thus, for a broader understanding of the species, its genomic information is consistently in demand. Transcripts sequences were acquired from transcriptome analysis using gill tissues of 12 olive flounders. Distribution of TEs inserted in exonic region of the olive flounder genome was analyzed using RepeatMasker ( http://www.repeatmasker.org/ ). We found 1140 TEs in the exonic region of the genome and long interspersed nuclear elements (LINEs) and long terminal repeats (LTRs) insertions occurred with forward orientation preferences. Transposons belonging to the hAt, Gypsy, and LINE 1 (L1) subfamilies were the most abundant DNA transposons, LTRs, and long interspersed elements (LINEs), respectively. Finally, we carried out a gene ontology analysis to determine the function of TE-fused genes. These results provide some genomic information about TEs that is useful for future research on changes in properties and functions of genes by TEs in the olive flounder genome.
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16
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Yum SY, Lee SJ, Park SG, Shin IG, Hahn SE, Choi WJ, Kim HS, Kim HJ, Bae SH, Lee JH, Moon JY, Lee WS, Lee JH, Lee CI, Kim SJ, Jang G. Long-term health and germline transmission in transgenic cattle following transposon-mediated gene transfer. BMC Genomics 2018; 19:387. [PMID: 29792157 PMCID: PMC5966871 DOI: 10.1186/s12864-018-4760-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 05/04/2018] [Indexed: 12/25/2022] Open
Abstract
Background Transposon-mediated, non-viral gene delivery is a powerful tool for generating stable cell lines and transgenic animals. However, as multi-copy insertion is the preferred integration pattern, there is the potential for uncontrolled changes in endogenous gene expression and detrimental effects in cells or animals. Our group has previously reported on the generation of several transgenic cattle by using microinjection of the Sleeping Beauty (SB) and PiggyBac (PB) transposons and seeks to explore the long-term effects of this technology on cattle. Results Transgenic cattle, one female (SNU-SB-1) and one male (SNU-PB-1), reached over 36 months of age with no significant health issues and normal blood parameters. The detection of transgene integration and fluorescent signal in oocytes and sperm suggested the capacity for germline transmission in both of the founder animals. After natural breeding, the founder transgenic cow delivered a male calf and secreted milk containing fluorescent transgenic proteins. The calf expressed green fluorescent protein in primary cells from ear skin, with no significant change in overall genomic stability and blood parameters. Three sites of transgene integration were identified by next-generation sequencing of the calf’s genome. Conclusions Overall, these data demonstrate that transposon-mediated transgenesis can be applied to cattle without being detrimental to their long-term genomic stability or general health. We further suggest that this technology may be usefully applied in other fields, such as the generation of transgenic animal models. Electronic supplementary material The online version of this article (10.1186/s12864-018-4760-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Soo-Young Yum
- Department of Theriogenology, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, #631 Building 85, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Song-Jeon Lee
- Embryo Research Center, Seoul Milk Coop, Gyeonggi-do, 12528, Republic of Korea
| | - Sin-Gi Park
- Bioinformatics Team, Theragen Etex Bio Institute, Advanced Institutes of Convergence Technology, Kwanggyo Technovalley, Suwon, 16229, Republic of Korea
| | - In-Gang Shin
- Bioinformatics Team, Theragen Etex Bio Institute, Advanced Institutes of Convergence Technology, Kwanggyo Technovalley, Suwon, 16229, Republic of Korea
| | - Sang-Eun Hahn
- Department of Theriogenology, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, #631 Building 85, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Woo-Jae Choi
- Department of Theriogenology, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, #631 Building 85, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Hee-Soo Kim
- Embryo Research Center, Seoul Milk Coop, Gyeonggi-do, 12528, Republic of Korea
| | - Hyeong-Jong Kim
- Embryo Research Center, Seoul Milk Coop, Gyeonggi-do, 12528, Republic of Korea
| | - Seong-Hun Bae
- Embryo Research Center, Seoul Milk Coop, Gyeonggi-do, 12528, Republic of Korea
| | - Je-Hyeong Lee
- Embryo Research Center, Seoul Milk Coop, Gyeonggi-do, 12528, Republic of Korea
| | - Joo-Yeong Moon
- Embryo Research Center, Seoul Milk Coop, Gyeonggi-do, 12528, Republic of Korea
| | - Woo-Sung Lee
- Embryo Research Center, Seoul Milk Coop, Gyeonggi-do, 12528, Republic of Korea
| | - Ji-Hyun Lee
- Department of Theriogenology, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, #631 Building 85, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Choong-Il Lee
- Department of Theriogenology, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, #631 Building 85, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Seong-Jin Kim
- Bioinformatics Team, Theragen Etex Bio Institute, Advanced Institutes of Convergence Technology, Kwanggyo Technovalley, Suwon, 16229, Republic of Korea
| | - Goo Jang
- Department of Theriogenology, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, #631 Building 85, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea. .,Emergence Center for Food-Medicine Personalized Therapy System, Advanced Institutes of Convergence Technology, Seoul National University, Gyeonggi-do, 16229, Republic of Korea.
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17
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Generation of Venus fluorochrome expressing transgenic handmade cloned buffalo embryos using Sleeping Beauty transposon. Tissue Cell 2018; 51:49-55. [DOI: 10.1016/j.tice.2018.02.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 02/21/2018] [Accepted: 02/23/2018] [Indexed: 12/27/2022]
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18
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Yum SY, Youn KY, Choi WJ, Jang G. Development of genome engineering technologies in cattle: from random to specific. J Anim Sci Biotechnol 2018; 9:16. [PMID: 29423215 PMCID: PMC5789629 DOI: 10.1186/s40104-018-0232-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 01/09/2018] [Indexed: 12/16/2022] Open
Abstract
The production of transgenic farm animals (e.g., cattle) via genome engineering for the gain or loss of gene functions is an important undertaking. In the initial stages of genome engineering, DNA micro-injection into one-cell stage embryos (zygotes) followed by embryo transfer into a recipient was performed because of the ease of the procedure. However, as this approach resulted in severe mosaicism and has a low efficiency, it is not typically employed in the cattle as priority, unlike in mice. To overcome the above issue with micro-injection in cattle, somatic cell nuclear transfer (SCNT) was introduced and successfully used to produce cloned livestock. The application of SCNT for the production of transgenic livestock represents a significant advancement, but its development speed is relatively slow because of abnormal reprogramming and low gene targeting efficiency. Recent genome editing technologies (e.g., ZFN, TALEN, and CRISPR-Cas9) have been rapidly adapted for applications in cattle and great results have been achieved in several fields such as disease models and bioreactors. In the future, genome engineering technologies will accelerate our understanding of genetic traits in bovine and will be readily adapted for bio-medical applications in cattle.
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Affiliation(s)
- Soo-Young Yum
- 1Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, 08826 Republic of Korea
| | - Ki-Young Youn
- 1Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, 08826 Republic of Korea
| | - Woo-Jae Choi
- 1Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, 08826 Republic of Korea
| | - Goo Jang
- 1Department of Veterinary Clinical Science, College of Veterinary Medicine and the Research Institute of Veterinary Science, Seoul National University, Seoul, 08826 Republic of Korea.,2Farm Animal Clinical Training and Research Center, Institute of GreenBio Science Technology, Seoul National University, PyeongChang-Gun, Gangwon-do 25354 Republic of Korea.,3Emergence Center for Food-Medicine Personalized Therapy System, Advanced Institutes of Convergence Technology, Seoul National University, SuWon, Gyeonggi-do 16629 Republic of Korea.,4College of Veterinary Medicine, Seoul National University, #85, Room631, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826 Republic of Korea
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19
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Wang M, Sun Z, Yu T, Ding F, Li L, Wang X, Fu M, Wang H, Huang J, Li N, Dai Y. Large-scale production of recombinant human lactoferrin from high-expression, marker-free transgenic cloned cows. Sci Rep 2017; 7:10733. [PMID: 28878310 PMCID: PMC5587717 DOI: 10.1038/s41598-017-11462-z] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 08/25/2017] [Indexed: 11/23/2022] Open
Abstract
Human lactoferrin (hLF) is a valuable protein for pharmaceutical products and functional foods, and worldwide demand for this protein has steadily increased. However, large-scale recombinant human lactoferrin (rhLF) production using current animal bioreactor techniques is limited by the low expression of foreign proteins, the use of antibiotic resistance genes and the down-regulation of endogenous milk proteins. Here, we generated a herd of marker-free, hLF bacterial artificial chromosome (BAC) transgenic cloned cows, as confirmed by Polymerase chain reaction, Southern blot and Western blot analyses. These transgenic cloned cows produced rhLF in milk at concentrations of 4.5–13.6 g/L. Moreover, the total protein content of the milk was increased. Over two hundred transgenic cloned cows were propagated by multiple ovulation and embryo transfer (MOET). A total of 400–450 g of rhLF protein, which shows similar enzymatic activity to natural hLF in iron binding and release, can be purified on a large scale from >100 L of milk per day. Our results suggested that transgenic bovine mammary bioreactors have the potential for large-scale protein production.
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Affiliation(s)
- Ming Wang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Zhaolin Sun
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Tian Yu
- Kejienuo Biotechnology Company, Wuxi, China
| | - Fangrong Ding
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Ling Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Xi Wang
- Kejienuo Biotechnology Company, Wuxi, China
| | - Mingbo Fu
- Kejienuo Biotechnology Company, Wuxi, China
| | - Haiping Wang
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China
| | - Jinming Huang
- Dairy cattle Research Center, Academy of Agricultural Sciences, Shandong, China
| | - Ning Li
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China.
| | - Yunping Dai
- State Key Laboratory for Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing, China.
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Narayanavari SA, Chilkunda SS, Ivics Z, Izsvák Z. Sleeping Beauty transposition: from biology to applications. Crit Rev Biochem Mol Biol 2016; 52:18-44. [PMID: 27696897 DOI: 10.1080/10409238.2016.1237935] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Sleeping Beauty (SB) is the first synthetic DNA transposon that was shown to be active in a wide variety of species. Here, we review studies from the last two decades addressing both basic biology and applications of this transposon. We discuss how host-transposon interaction modulates transposition at different steps of the transposition reaction. We also discuss how the transposon was translated for gene delivery and gene discovery purposes. We critically review the system in clinical, pre-clinical and non-clinical settings as a non-viral gene delivery tool in comparison with viral technologies. We also discuss emerging SB-based hybrid vectors aimed at combining the attractive safety features of the transposon with effective viral delivery. The success of the SB-based technology can be fundamentally attributed to being able to insert fairly randomly into genomic regions that allow stable long-term expression of the delivered transgene cassette. SB has emerged as an efficient and economical toolkit for safe and efficient gene delivery for medical applications.
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Affiliation(s)
- Suneel A Narayanavari
- a Mobile DNA , Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC) , Berlin , Germany
| | - Shreevathsa S Chilkunda
- a Mobile DNA , Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC) , Berlin , Germany
| | - Zoltán Ivics
- b Division of Medical Biotechnology , Paul Ehrlich Institute , Langen , Germany
| | - Zsuzsanna Izsvák
- a Mobile DNA , Max Delbrück Center for Molecular Medicine in the Helmholtz Association (MDC) , Berlin , Germany
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